From 4ec6acfae7e830b6a2282b07f6ade8db682a1847 Mon Sep 17 00:00:00 2001
From: Thomas Prescott <tcprescott@gmail.com>
Date: Tue, 5 Oct 2021 14:11:55 -0500
Subject: [PATCH] Remove ZSNES graphic

This graphic takes up too much space.  Instead if the check fails just do a STP and don't include any of the ZSNES graphics.  If we want to add some other message here later we can, but it's more of a nice to have than a necessity.
---
 zsnes.asm | 98 -------------------------------------------------------
 1 file changed, 98 deletions(-)

diff --git a/zsnes.asm b/zsnes.asm
index e4cde9d..5c27ec6 100644
--- a/zsnes.asm
+++ b/zsnes.asm
@@ -11,104 +11,6 @@ CheckZSNES:
     LDA #$01FF : TCS ; thing we wrote over - initialize stack
 JML.l ReturnCheckZSNES
 .zsnes
-; Set up video mode
-    SEP #$30    ; X,Y,A are 8 bit numbers
-    LDA #$80    ; screen off
-    STA $2100   ; brightness + screen enable register
-    LDA #$03
-    STA $2105   ; video mode 3, 8x8 tiles, 256 color BG1, 16 color BG2
-    STZ $2106   ; noplanes, no mosaic, = Mosaic register
-    LDA #$01
-    STA $210B   ; Set BG1 tile data offset to $2000
-    STZ $210D   ; Plane 0 scroll x (first 8 bits)
-    STZ $210D   ; Plane 0 scroll x (last 3 bits) #$0 - #$07ff
-    LDA #$01
-    STA $212C   ; Enable BG1
-    LDA #$FF
-    STA $210E   ; Set BG1 scroll register
-    STA $210E
-    STZ $212E   ; Window mask for Main Screen
-    STZ $212F   ; Window mask for Sub Screen
-    LDA #$30
-    STA $2130   ; Color addition & screen addition init setting
-    STZ $2131   ; Add/Sub sub designation for screen, sprite, color
-    LDA #$E0
-    STA $2132   ; color data for addition/subtraction
-    STZ $2133   ; Screen setting (interlace x,y/enable SFX data)
-    STZ $4200   ; Disable V-blank, interrupt, Joypad register
-    
-    REP #$10
-
-
-; Load tilemap and tile data
-    STZ $2116
-    LDA #$0C
-    STA $2107   ; Set BG1 tilemap offset to $1800 and size to 32x32
-    STA $2117   ; VRAM write address $1800
-    
-    LDA #$80
-    STA $2115   ; VRAM single word transfer, word increment
-    LDX #$1801
-    STX $4300   ; DMA destination: VMDATAL/VMDATAH, fixed source
-    LDX.w #ZSNES_TileMap
-    STX $4302   ; Low DMA source address
-    LDA.b #ZSNES_TileMap>>16
-    STA $4304   ; High DMA source address
-    LDX.w #$800
-    STX $4305   ; Transfer 2048 bytes
-    LDA #$01
-    STA $420B   ; Start DMA transfer
-    
-    LDX.w #ZSNES_Tiles
-    STX $4302   ; Low DMA source address
-    LDA.b #ZSNES_Tiles>>16
-    STA $4304   ; High DMA source address
-    LDX.w #$8000
-    STX $4305   ; Transfer 32768 bytes
-    LDA #$01
-    STA $420B   ; Start DMA transfer
-    
-    LDX.w #$8000
-    STX $4302   ; Low DMA source address
-    LDA.b #$38 ; (ZSNES_Tiles>>16)+1
-    STA $4304   ; High DMA source address
-    LDX.w #$6040
-    STX $4305   ; Transfer 24640 bytes
-    LDA #$01
-    STA $420B   ; Start DMA transfer
-
-; Load CGRAM via DMA transfer
-
-    STZ $2121   ; Start at color 0
-    LDX #$2200
-    STX $4300   ; DMA destination: CGDATA, byte increment
-    LDX.w #ZSNES_Palette
-    STX $4302   ; Low DMA source address
-    LDA.b #ZSNES_Palette>>16
-    STA $4304   ; High DMA source address
-    LDX #$0200
-    STX $4305   ; Transfer 512 bytes
-    LDA #$01
-    STA $420B   ; Start DMA transfer
-
-    LDA #$0F    ; screen on, full brightness
-    STA $2100   ; brightness + screen enable register
 	
 STP ; !
 ;--------------------------------------------------------------------------------
-;@ pushpc
-;@ check bankcross off
-
-org $378000
-
-ZSNES_Tiles:
-    incbin zsnes_tiles.bin
-    
-ZSNES_TileMap:
-    incbin zsnes_tilemap.bin
-
-ZSNES_Palette:
-    incbin zsnes_pal.bin
-	
-;@ check bankcross on
-;@ pullpc
\ No newline at end of file